The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-30S is a double-acting, single-rod pneumatic cylinder that puts a 30 mm field-adjustable stroke end right at the rear cap, letting you fine-tune the 200 mm nominal stroke without swapping the cylinder. With a 20 mm rod, PT1/4 ports, and a 28 mm air cushion, it delivers 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), making it a solid mid-range workhorse for commissioning trials and format changeovers.
This model carries the -S suffix, so a built-in magnet is embedded in the piston. You can clamp CMSG, DMSG, or EMSG reed or solid-state sensors directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position sensing. The body length A(SCJ) is 197 mm, and the cylinder is rated for a maximum standard stroke of 1500 mm, giving you plenty of room to grow the stroke length if needed.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -30 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 30 mm rear screw lets technicians dial in the exact stroke end on a new machine during initial setup, compensating for small stack-up tolerances without needing shims or custom end-stops.
On a packaging line switching between box sizes, the adjustable stroke allows a quick mechanical change of the pusher's end position, reducing downtime between batches.
In a woodworking clamp that cycles millions of times, the screw can be periodically advanced to compensate for pad wear, maintaining consistent clamping force without replacing the cylinder.
Choose the SCJ63 bore when the SCJ50's 982 N push at 0.5 MPa is a little too close to your load margin; the 63 mm bore steps you up to a comfortable 1559 N without jumping to the much larger SCJ80 (2513 N). If you need the same 200 mm stroke but without the adjustable end-stop, the fixed-stroke SC63X200 is a simpler, slightly shorter alternative. For a drop-in replacement, match the 63 mm bore, 200 mm nominal stroke, 30 mm adjust range, PT port thread, and the -S magnet; the basic mount here means you supply your own mounting bracket from the SCJ subset (FA, LB, or TC). At 200 mm, rod buckling is not a primary concern, but for off-axis loads, consider adding an external linear guide.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the pull force is lower because the 20 mm rod reduces the piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 3118 N.
Yes, if your existing cylinder is an AirTAC SCJ63 with a 200 mm nominal stroke, a 30 mm adjust range, PT ports, and a built-in magnet. The mounting is basic, so your existing FA, LB, or TC mounting hardware will bolt straight onto this new cylinder body.
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